Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d46cf8b9c9feb7…

MALICIOUS

PDF

83.1 KB Created: 2021-09-09 04:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 299923373a6fe6f108be17df5839d76e SHA-1: 1ec0a50128070812457f29c0f3a771c956398555 SHA-256: 62d46cf8b9c9feb721cb563f92876d331d2698cee971b8aad05a91728199ca84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs hosted on potentially compromised or disposable domains, suggesting an attempt to lure users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://acrclubinversores.com/files/galeria/files/fiximewuxujonomov.pdf In PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613940c3d74fb---46951969280.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/1j12uti0647bjhdfcohp7iv83p/85717240858.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/rurikajofadojogazitofepi.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/45920047043.pdfIn PDF document text
    • https://rozynoklinika.lt/userfiles/file/fogexorosovuvod.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/rasadoxeredusufosari.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/xutezum.pdfIn PDF document text
    • http://yyfxsw.com/upload/files/vibiraf.pdfIn PDF document text
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/nomumuvozalefozupux.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/jekonopovel.pdfIn PDF document text
    • http://ljsmelt.com/upload/files/20328184948.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/27768276715.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/5171219727.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/070d7238df466dadfdd46d599ab47660/59200872771.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/69794458392.pdfIn PDF document text
    • http://kahasat.cz/data/file/41370431491.pdfIn PDF document text
    • http://scandinavia-ex.com/images/blog/file/95966490606.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/41505941018.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/kidiwotunugibux.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/patufujekesejedoded.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/37192826632.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/jatizulixazopasovibivuziw.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/89731732096.pdfIn PDF document text
    • http://handgun.ee/media/file/milagunadakidabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=mod+vector+apkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB84 19852 bytes
SHA-256: 020364b293adcc2fa9f2696ca40b818d7eac06b296da33880626988ef957b976
font_01_sfnt_off00010fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA9 10248 bytes
SHA-256: 81871bc9e3b4ccbd24f136c7de0432b86d7878223cdacd202d61c08d873e37b9
font_02_sfnt_off000126d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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